docker: update web image build process and README

- Added a new target "web-build" to streamline the build process for web artifacts.
- Updated "evobgp-web" and "evobgp-web-all" targets to utilize the new "web-build" context.
- Modified Dockerfile to reflect changes in the build stages and context for web artifacts.
- Revised README to clarify the new build process and dependencies.

deploy/docker/README.md

@@ -8,7 +8,7 @@
 |------|--------|
 | 8× `go mod download` + 8× `go build` (разные BIN) | 1× download + 1× компиляция всех `cmd/*` |
 | 2× сборка BIRD из исходников (api, all) | 1× stage `birdc`, копируется в runtime |
-| 2× `npm ci` (web, web-all) | 1× `web-deps` + два nginx-образа |
+| 2× `npm ci` (web, web-all) | 1× `web-deps` + 1× `web-build` + два nginx-образа (общий артефакт) |
 | 8 runner'ов с checkout/login | 1 job `docker-go`, 1 job `docker-web` |
 
 Кэш registry (переменные bake):

deploy/docker/docker-bake.hcl

@@ -65,7 +65,7 @@ group "go-images" {
 }
 
 group "web-images" {
-  targets = ["evobgp-web", "evobgp-web-all"]
+  targets = ["web-deps", "web-build", "evobgp-web", "evobgp-web-all"]
 }
 
 # --- Go: go mod download → все cmd/* → birdc (один раз) → runtime-образы ---
@@ -202,13 +202,26 @@ target "web-deps" {
   cache-to   = web-cache-to()
 }
 
-target "evobgp-web" {
+target "web-build" {
   context    = "../.."
   dockerfile = "deploy/docker/evobgp-web/Dockerfile"
+  target     = "build"
   platforms  = ["linux/amd64"]
   contexts = {
     deps = "target:web-deps"
   }
+  cache-from = web-cache-from()
+  cache-to   = web-cache-to()
+}
+
+target "evobgp-web" {
+  context    = "../.."
+  dockerfile = "deploy/docker/evobgp-web/Dockerfile"
+  target     = "web"
+  platforms  = ["linux/amd64"]
+  contexts = {
+    web-artifacts = "target:web-build"
+  }
   args       = { EVOBGP_UPSTREAM = "evobgp-api" }
   cache-from = web-cache-from()
   cache-to   = web-cache-to()
@@ -216,8 +229,16 @@ target "evobgp-web" {
 }
 
 target "evobgp-web-all" {
-  inherits   = ["evobgp-web"]
+  context    = "../.."
+  dockerfile = "deploy/docker/evobgp-web/Dockerfile"
+  target     = "web"
+  platforms  = ["linux/amd64"]
+  contexts = {
+    web-artifacts = "target:web-build"
+  }
   args       = { EVOBGP_UPSTREAM = "evobgp-all" }
+  cache-from = web-cache-from()
+  cache-to   = web-cache-to()
   tags       = image-tags("evobgp-web-all")
 }
 

deploy/docker/evobgp-web/Dockerfile

@@ -1,5 +1,6 @@
 # syntax=docker/dockerfile:1.7
 # Статическая панель EvoBGP (SvelteKit) + nginx.
+# Финальный stage `web` ожидает bake-контекст web-artifacts (= target:web-build).
 FROM public.ecr.aws/docker/library/node:22-alpine AS deps
 WORKDIR /web
 COPY web/package.json web/package-lock.json ./
@@ -10,9 +11,9 @@ FROM deps AS build
 COPY web/ ./
 RUN npm run build
 
-FROM public.ecr.aws/docker/library/nginx:1.27-alpine
+FROM public.ecr.aws/docker/library/nginx:1.27-alpine AS web
 ARG EVOBGP_UPSTREAM=evobgp-api
 COPY deploy/docker/evobgp-web/nginx.conf /tmp/nginx-default.conf
 RUN sed -e "s/evobgp-api/${EVOBGP_UPSTREAM}/g" /tmp/nginx-default.conf > /etc/nginx/conf.d/default.conf \
     && rm -f /tmp/nginx-default.conf
-COPY --from=build /web/build /usr/share/nginx/html
+COPY --from=web-artifacts /web/build /usr/share/nginx/html